The frequency separating audible waves and ultrasonic waves is considered to be 15.0 kHz. What wavelength in air at room temperature is associated with this frequency? (Assume the speed of sound to be 225 m/s.)
a. 1.50 cm
b. 33.8 cm
c. 22.5 cm
d. 33.8 cm
e. 33.8 cm
a
Physics & Space Science
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An astronomical unit (AU) is
A) any very large unit, such as a light-year. B) the average distance between Earth and the Sun. C) the current distance between Earth and the Sun. D) the average distance between any planet and the Sun.
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Explain how the telescopic discoveries of Galileo could be used in support of Copernicus
What will be an ideal response?
Physics & Space Science
Which type or types of rock cannot be dated radiometrically?
A) igneous and metamorphic B) sedimentary C) metamorphic D) igneous
Physics & Space Science
An ideal incompressible fluid flows at 12 m/s in a horizontal pipe. If the pipe widens to twice its original radius, what is the flow speed in the wider section?
A) 12 m/s B) 6.0 m/s C) 4.0 m/s D) 3.0 m/s
Physics & Space Science